Question

Which of the following is the use of ultrasonic sound?
a.to find the depth of the sea
b.to measure sound velocity
c.to find frequency of sound
d.to join plastic surfaces​

Answer 1

Explanation:

Ultrasonic devices are used to detect objects and measure distances. Ultrasound imaging or sonography is often used in medicine. In the nondestructive testing of products and structures, ultrasound is used to detect invisible flaws.

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Answer 2

Answer:

a) find the depth of the sea (☑️)

Explanation:

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